Spool and bobbin



No Model.) 4 J. L. CHENEY. SPOOL AND BOBBIN.

No. 290,534. Patented Dec. 18, 1883'.

UNITED STATES PATENT FFICE.

SPOOL AND BOBBIN.

SPECIFICATION forming part of Letters Patent No. 290,534, dated December18, 1883.

Application filed March 21, 1883. (No model.)

To aZZ whom it may concern.-

Be it known that 1, Joan L. CHENEY, a citizen of the United States,residing at Lowell, in the county of Middlesex and Commonwealth ofMassachusetts, have invented certain new and useful Improvements inSpools and Bobbins, of which the following is a specifloat-ion.

My invention relates to spools and bobbins formed of wood and having abarrel circular in cross-section, and circular heads secured to the endof the barrel 5 and it has for its object to connect the heads to thebarrels in a cheap and effectual manner.

In the accompanying drawings, Figure 1 is an oblique view of a spoolconstructed according to my invention, the lower end being in section;Fig. 2, an end view of the same; Figs. 3 and 4, central longitudinalsections of the head and barrel, respectively; Fig. 5, an oblique viewof the ring-key.

The common practice is to provide the central opening of the head with afemale screw and to cut a corresponding thread on the end of the bobbin,and to screw the head onto the barrel against a shoulder. In this casethe threads of the barrel are likely to be broken by screwing the headwith too much force against the shoulder. Heads are also secured bypins, which shrink and come out, and are sometimes held on by taperingbushings driven into the reduced ends of the barrels to expand them andfill the opening in the head, such opening being sometimes of uniformdiameter and sometimes flaring. Such bushings frequently shrink and fallout, and the reduced end of the spool is necessarily made thinner orsplit, and thereby weakened, to allow it to spread. I form a shoulder,D, on the barrel Ain the usual manner; but I make the barrel from theshoulder to the nearest end of the barrel like a frustum of a cone, E. Iprovide the head 13 with a flaring opening, F, the smallest diameter ofsaid opening being on the inside of the head, and preferably just largeenough to admit the end of the barrel, and

place the head around the reduced end E- of the barrel and against theshoulder in the usual manner. I then make an annular wedge or ring key,0, of the shape and size of the space between the end of the barrel andvthe sides of the opening in the head when the head is on the end of thebarrel and concentric with the barrel, this space being wider at the endof the barrel than at the shoulder, as the open ing in the head is moreflaring than thereduced end of the barrel. This ring-key is therefore anannular wedge, and is made of wood, the grain running from the thick tothe thin edge of the key 0. The ring is intended to be just large enoughto wholly fill the space between the barrel and the head, and is sawedor split through at O on one side, that it may be expanded to take inthe end of the barrel. Glue may be applied to the key by dipping thethin end of it in glue for about half its length, and it is then placedin the space and driven firmly in between the reduced end of the barreland the head, the key closing about the barrel and filling the entirespace between the said barrel and head.

It will be seen that the ring-key will remain in place, and will serveto secure the head of the barrel until it becomes wholly detached fromboth the head and the barrel, and that these two parts cannot beseparated while the key remains in place. .A wedge of pliable metalmight be used in place of a wooden wedge.

I claim as my invention The combination of the barrel provided with ashoulder and the end flaring outward from said shoulder, the head havinga central outwardly-flaring opening, and an annular wedge adapted tofill the space between said head and the reduced end of said barrel, asand for the purpose specified.

JOHN L. CHENEY.

WVitnesses:

ALBERT M. Moons, EDWARD W. THOMPSON.

